Duplicating machine



ug. 23, 1932. D. GESTETNER DUPLICA'I'ING MACHINE Filed Dec. 23, 1930 5 ShetS-Sheet l r I IIIMHHUUHHxIIHHIIlIIMHxIIHm PH.:

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AU@ 23, 1932 D. GESTETNER DUPLICATING' MACHINE Filed Dec. 23. 1930 3 Sheeis-Sheei Aug. 23, 1932. D, GESTETNR Ln/727 DUPLICATING MACHINE Patented Aug. 23, 1932 NIT-E j s- `,.'PATENiioFFiCE DAvIio GESTETNER, OI' IOTIENIIAM IIALE, LONDON, ENGLAND,` AssIGNoR', 'BYl MESNE ASSIGNMENTS, To Aunis. DICK COMPANY,V OF CHICAGO', ILLINOIS, A CORPORATION on ILLINOIS` l Y `Y DUIfLICATINGivIACHINii I ,Y 'Atpiieatioiiiea Dembr 23, 1930; seriaiNo. 504,366, alla `in Greafisrnain February 1, 1930,

This invention relates to duplicating machines of the kind in which with a plurality of inking cylinders there is associated a flexible stencil carrier secured to endless bands wherevby the stencil is 2caused to travel over the inking cylinders. Y l

The objectof the invention is to provide means adapted to facilitate the cleaning, that is to say', `the removal ofink from the inking "l0 cylinders.

, The invention consists, broadly, in means Nfor removing ink from the inking Cylinders of duplicating` machinesf of the kind above Y refferred to comprising a scraper element in the 'L25 Vform of a strip of flexible material', the oppositeedges of which are adapted to bearl against the inking cylinders, a rigid support 'for the-'scraper element, arms associated with the rigid support adaptedto vbe brought in L position to bear' against some stationary por- 'tion of the duplicating machine and` further arms on the rigid support adapted to extend 'between the inking cylinders to resist rotan. tional motionbeing imparted to the device 5 consequent upon rotation ofthe inking'cylinders. A .Y e

' Conveniently, the arms adapted to engage some stationary portion of they machine are j I, provided on the ends of rods slidablymounted 0 in guides in the frame lmember of the clean- 'ing device and adapted to lbe axially moved `to bring the arms intol and out `of position'to 'engage'some stationary portion of the mad. Chineand, preferably, tobe rotated about A' ""5 their axes to press the scraper element against Vthe inking cylinders. Y l v Thus, for instance, the guides' for therods lmay be tubulary and be provided with vslots l"similar to/those provided in a bolt', means beiing provided on the rods adapted to .co-operatewith the slots and function as means for AP imparting motion to the rods and forjsecuring the same in positionlto retain the scraper ,element in 1Contact with the inking cylinders.

The ends of the armsare .conveniently recessed particularly when they are-designed to `engage ragainst the armsprovided in thereon- 'struction ,of duplicating 'machine described in the specification of application for Letters 'Patent No.'440,5`1 8 `iled"n the 31st day of March, 1930, for engaging Vand locating the i Waver rollers with respect'to the inking cylinders. n l y Preferably, the scraperelement isarranged to be detachably connected with thev frame member and it may consist of a strip of fibre or felted fabric suchas thick paper wholly or in part coated vor covered with a thin sheet of india-rubber or with some other composition, for instance, a gelatine composition which is 4impermeable to ink, j

The invention will be described further in vdetail as applied to a stencil ,duplicating ma- Uchine in accordance with the above-mentioned application with reference tothe accompanying drawings, in which:

` F'gure. l is a view in elevation of a cleaning or ink-removing device in accordance with the invention;

Figure 2 is a corresponding plan view;

,l Figure 3 is a front elevation of Va detail, namely, the element Vfunctioning as a scraper for removing theink, n I y p Figure 4 being a corresponding end elevation; l

Figure 5l is a fragmentary View of a duplicating machine with the cleaningorink-removing device in position; n

FigureV 6 is a fragmentary view offa duplicating machine with the cleaning or ink-removing device in position thereon' viewed in thev direction of thev arrow V in Figure 7, which is a corresponding end elevation viewed in the direction of the arrowVII in themutilated plan view, Figure'8.

In the drawings, l is the scraper element, the edges 2 Of which'are coated with a composition, suclifor example as a gelatineA composition, adapted to render the edges of the "scraper element impermeable to ink and to and the inking cylinders.

Thisscraper element visprovided with a Vplurality of holesv 3 and with recesses 4 in its ends, the h oles being providedto engage the v,pins 5 and the lrecesses to engage the arms 6 formed on the frame member functioning asa support for the scraperjeleinent. [With the frame member thereis associated af member- "7 which, in the Vconstruction illustrated is rovide a smooth bearing between the edges l formed of a strip of sheet metal suitably bentso that its opposite sides may engage about the portion 8 of the frame member extending between the arms above referred to, thus forming with the adjacent portion of the frame member a tubular guide within which there areslidably-arranged two rods9andl9a provided with loops 10 and 10a functioning as handles whereby they may be moved longitudinally within theftubular guide.

ffn'the member8 there are provided slots v11 and 11a similar to the slots provided in a bolt, that is to say, each of the slots is provided with lateral extensions in one of its sides, the purpose of which is to enable, when the rods have Vbeen moved ylonggitudinally away from one anotherand subsequently rotated, the loops 10 and'lOa to be engaged with such extensionsin order to retain .the rods in theposition'which by such motion they have been caused-to assume, Y A

On'the ends-'ofthe rods there are provided lprojections 12 and 12a-in the extremities of which recesses 13 and lBaare formed adapted toengage the `levers 14`forming partof the duplicating machine, as shown moreclear-ly in Figure', whereby the'inlr distributingirollers co-operating with the cylinders Ahaving vbeen removed the scraper element will besecured in position againstthe cylinders 15 and 15a of the duplicating machine, when it is'de- `sired/-to clean the sameor, in other words,re move-the ink adhering' to thennthe arms G extending between the cylinders andfbeingengaged inthe channels 16'and 16a adjacent to the ends thereof. l

. The inlring cylindersinthe construction'illustrated are rotatablymounted, see Figures 6, and 8,in'the sidefmembers fland -17 a of the frame of the duplicating machine vand .theyare arrangedto `be rotated fbyfmeans of .a handle 18, shown broken away in Figuret, through any suitable driving connection, fie-X- .ible endless bands 19 vand 19a beingprovided r.for securing -a driving connection'between the lower andA the upper inking cylinders.

Onthe spindle of the upper inking cylinder Vpairsof.- levers -14 Vand 14a are pivoted. The -levers of each pair are vconnectedtogether by a spring 20 and areassoci'ated with allever 21 Vpivotallyfmountedon thepin 221secured to their aid,-be secured in position with the edges Y ofthe scraper element bearing firmly` against Y`the .inking cylinders.

By giving the inking cylinders vone complete revolution when Akthe `scraper in this f position, substantially the whole of the ink will be removed therefrom, the ink being collected upon the scraper element. The cleaning device may then be removed from the machine by rotating the rods 9 and 9a so as to release the handle members 10 and v10a from-engagement Vin the .lateral extensions of the slots 11 and 11a thus causing the projections 12 and 12a to move into the position shown in dotted Iline iirFigure 15* and subsequently sliding the rods linto the vposition shown in dotted line in Figures 1 and 2. The scraper element may 'then-be detached from the pins 5 on the frame member andmay be cleaned or thrown away.

I claim as new and desire to secure byLetters Patent is: v j A1. Means for Fremoving inlr :from theinking cylinders oil a :duplicatinglmachine `ci' .theflrind in which with a,plurality of inking lcylinders ournalled. in 1 a frame `there is .associated 'a flexible stencil Acarrier secured to endless bands whereby vthe stencil `is caused to'v travel over theinking 'cylinders comprising av scraper .element inthe formof a strip of flexiblematerial, the oppositeA edges of which are adapted vtoibear against:theinkingcylinders, a rigid supportfor Vthe Yscraper element, arms associatedwith the rigid support. adapted tobe 'brought in .position zto bear against some .stationary .portion of lthe duplicating machine and further arms onthe rigid support vadapted to .extend between the inking cylinders to V.resist rotational .motion being imparted tothe device consequent upon1rotationofthe .inking cylinders. l Y 2. AMeans for removingzink fromzthe'inking cylinders of a duplicating machine offthe kindin which1with apluralty ofinlingcyL in'ders journalledin a framethere yisassociated a iiexible stencil .carrier secured .to endless bands whereby .the stencil .is Ycaused to travel .overrthe inkingcylinders comprising a'scraper :elementrin theform of a strip of flexible,- material, ya rigid support Iforthe scraper element, guides on vsaid rigid support, rods slidably mountedin ysaid guides arms on theends of said rods .adjacent tothe ends ofthe rigidsupport adapted whentherods are extendedin their'guides, to engage some ixedportion of the duplicating machinesand imparted to the rigid support consequent upon rotation of the inking cylinders.

3. Means for removing ink from the inking cylinders of a duplicating machine of the kind in which with a plurality of inking cylinders journalled in a frame there is associated a flexible stencil carrier secured in endless bands whereby the stencil is caused to travel over the inking cylinders comprising a scraper element in the form of a strip of iexible material, a rigid support for the scraper element, tubular guides on said rigid support, rods slidably mounted in said guides, arms on the ends of said rods adjacent to the ends of the rigid support adapted, when the rods are slid outwards in their guides, to engage some fixed portion of the duplicating machine and press the opposite edges of the scraper element against the inking cylinders, bayonet slots in the tubular guides, projections on the rods adapted to co-operate with said bayonet slots to permit the rods when slid outwards to be rotated about theirv axes to retain the rods in the said position and further arms on the rigid support adapted to extend between the inking cylinders of the duplicating machine and to resist rotational motion being imparted to the rigid support onsequent upon rotation of the inking cyliners.

4. Means for removing ink from the inking cylinders of a duplicating machine of the kind in which with a plurality of inking cylinders journalled in a frame there is associated a flexible stencil carrier secured to endless bands whereby the stencil is caused to travel over the inking cylinders comprising for supporting a flexible scraper element a frame member including a central portion and arms at each end extending at right angles from said central portion adapted to engage between the inking cylinders ofthe duplicating machine, guides on theV central portion of the frame member, rods slidably mounted in said guides, arms extending at right angles from said rods adapted when the rods are slid outward in their guides to engage some xed portion of the machine and press the opposite edgesof the scraper element into firm contact with the inking cylinders of the duplicating machine.

In testimony whereof I have signed my name to this specification.

f DAVID GESTETNER. 

